TY JOUR TI WINTER-SPRING YEAR SEASON INFLUENCE ON THE ANOMALOUS SPERM CELL FORM SHARE IN THE NATIVE AND CRYOPRESERVED SPERM OF THE HOLSTEIN BULL-SPERM DONORS KW genotype KW stud bull KW sperm cell KW anomalous sperm cell form share KW native and cryopreserved sperm JO Bulletin of KSAU AU Chetvertakova, E.V. PY 2012 IS PB Krasnoyarsk State Agrarian University